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Gravity sorting system and beneficiation method of chromite

A technology of gravity separation and beneficiation method, applied in chemical instruments and methods, solid separation, wet separation and other directions, can solve the problems of large water consumption, high chemical beneficiation cost, poor magnetic separation selectivity, etc. The effect of superior production indicators and improved processing capacity

Pending Publication Date: 2020-07-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the beneficiation methods of chromite include gravity separation, magnetic separation, flotation and chemical beneficiation, flotation has the disadvantages of high cost and chemical pollution, magnetic separation has the disadvantage of poor selectivity, and chemical beneficiation has the disadvantages of high cost and pollution. Therefore, the chromite gravity separation method is the most effective and main beneficiation method. Shaking table, jig, and spiral chute are all used, but the shaking table is the most used, and jigging is often only suitable for lump ore beneficiation. Unable to adapt to beneficiation of fine-grained minerals
However, the conventional spiral chute is used to separate chromite ore. Due to the limitation of the enrichment performance of the conventional spiral chute, it is impossible to directly obtain sufficiently high-grade chromite concentrate. It is necessary to configure a shaking table for beneficiation to obtain qualified chromite concentrate.
However, the shaking table has a small processing capacity of a single machine (0.3-1t / h. Taiwan), a large water consumption (1-3m 3 / h. Taiwan), high technical requirements for workers, large floor area, difficult to configure a large number of shortcomings, etc., cannot meet the production requirements of large-scale chromite ore beneficiation
As the scale of chromite ore beneficiation is increasing, the original beneficiation process using "shaker" or "spiral chute + shaker" configuration can no longer meet the needs of large-scale production. It is urgent to develop a simple process, easy operation, Chromite ore beneficiation process and method with easy maintenance, low consumption, cleanness, and easy realization of large-scale production

Method used

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  • Gravity sorting system and beneficiation method of chromite
  • Gravity sorting system and beneficiation method of chromite
  • Gravity sorting system and beneficiation method of chromite

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Experimental program
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Embodiment 2

[0023] On the basis of implementation column 1, the number of spiral chute 1 for rough selection, spiral chute 2 for one-stage selection, spiral chute 3 for second-stage selection, spiral chute 4 for one-stage sweeping, and spiral chute 5 for second-stage sweeping are all 3 tower. The value of the moment-to-diameter ratio A of the spiral chute 1 for coarse selection is 0.50, and the value of the transverse inclination B is 8.7°; The value of the transverse inclination B is 10.5°; the value of the moment-to-diameter ratio A of the spiral chute 4 and the second stage sweep is 0.43, the value of the transverse inclination B is 8.2°, and the grade is 26.75% (Cr 2 o 3 ) of chromite after sorting, the concentrate grade of the obtained chromite is 49.71% (Cr 2 o 3 ), the productive rate is 47.56%, and the recovery rate is 88.38%.

Embodiment 3

[0025] On the basis of embodiment 1, the number of spiral chute 1 for rough selection, spiral chute 2 for one-stage selection, spiral chute 3 for second-stage selection, spiral chute 4 for one-stage sweeping, and spiral chute 5 for second-stage sweeping are all 4 tower. The value of moment-to-diameter ratio A of spiral chute 1 for coarse selection is 0.50, and the value of transverse inclination B is 9.3°; The value of the lateral inclination B is 9.5°; the value of the moment-to-diameter ratio A of the spiral chute 4 and the second stage of sweeping is 0.47, and the value of the lateral inclination B is 8.6°. The obtained chromite concentrate grade 48.81% (Cr 2 o 3 ), the productive rate is 49.12%, and the recovery rate is 89.63%.

[0026] Through the technical solution of the invention, in the beneficiation operation section, the spiral chute configured has a larger distance-to-diameter ratio and a lateral inclination angle, a larger slurry flow rate, and a larger centrif...

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Abstract

The invention discloses a gravity sorting system and a beneficiation method of chromite. The gravity sorting system comprises a spiral chute for rough sorting, a first spiral chute for concentration,a second spiral chute for concentration, a first spiral chute for scavenging and a second spiral chute for scavenging. The distance-to-diameter ratio A of the spiral chute for rough sorting is 0.50-0.55, and the cross dip B of the spiral chute for rough sorting is 8.7-9.3 degrees. The distance-to-diameter ratio A of the first spiral chute for concentration and the second spiral chute for concentration is 0.58-0.62, and the cross dip B is 9.5-10.5 degrees. The distance-to-diameter ratio A of the first spiral chute for scavenging and the second spiral chute for scavenging is 0.43-0.47, and the cross dip B is 8.2-8.6 degrees. By adopting the gravity sorting system to conduct rough sorting, concentrating and scavenging, the beneficiation processing capacity and the grade and recovery rate of the chromite concentrate can be greatly improved. The gravity sorting system has the advantages of being easy and convenient to produce and operate, low in consumption, environmentally friendly, stablein index and the like. The gravity sorting system is suitable for large-scale chromite beneficiation production requirement, and the production index is excellent.

Description

technical field [0001] The invention belongs to the mineral processing field, and in particular relates to a gravity separation system and a chromite mineral processing method. Background technique [0002] Chromite resources are mainly distributed in Africa, and South Africa and Zimbabwe account for 97% of the world's total. Due to the lack of chromite resources, my country needs to import a large amount of chromite every year. At first, it mainly imported high-grade lump ore raw ore. However, with the gradual reduction of high-grade lump ore raw ore resources, it is becoming more and more difficult to obtain enough high-grade chromite. Iron ore lump ore, but the amount of discarded low-grade chromite ore in mines is increasing. It is urgent to develop effective beneficiation methods to select high-grade chromite concentrate from low-grade chromite ore. Although the beneficiation methods of chromite include gravity separation, magnetic separation, flotation and chemical ben...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03B5/62
CPCB03B9/00B03B5/626
Inventor 刘惠中宋小军殷明强张启忠徐文凯钟骏薇
Owner JIANGXI UNIV OF SCI & TECH